diff --git a/Makefile.am b/Makefile.am
index fce04e0..0aadf6c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -19,7 +19,7 @@
 phosphor_timemanager_LDADD = libtimemanager.la
 
 generic_cxx_flags = $(PHOSPHOR_DBUS_INTERFACES_CFLAGS) \
-                    $(SDBUSPLUS_CFLAGS)
+                    $(SDBUSPLUS_CFLAGS) -flto
 
 generic_ld_flags = $(PHOSPHOR_DBUS_INTERFACES_LIBS) \
                    $(SDBUSPLUS_LIBS)